Extrusion & Post
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PETG recycled pelletizing pellet yellowing
Fenómeno del problema
After PETG scrap is crushed, recycled and re-pelletized, the pellet color obviously yellows.
Análisis de la causa
The recycled material undergoes another thermal history during extrusion pelletizing causing thermal degradation and oxidation, and the waste is mixed with impurities or contaminants.
Solución
Control recycling pelletizing temperature at 220-240°C; fully clean the waste to remove contaminants; add antioxidant during pelletizing.
Conclusión clave
PETG recycling pelletizing color control requires lowering temperature and adding stabilizers.
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